# 2008 Jeep Grand Cherokee Tire Size

Your Jeep was manufactured with different tire sizes. To determine the best tire size for your specific 2008 Jeep Grand Cherokee, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your Jeep Grand Cherokee's rim size is the number to the right of the R. In the example pictured here, the tire size fits 16-inch rims.

## Rim Size Selection

Now that you know your rim size, make a selection below to filter your results.

## 17-Inch Rims

### 2008 Jeep Grand Cherokee

The original tire size for your 2008 Jeep Grand Cherokee is listed below. Tap on the box to view a color-coded explanation of your Jeep Grand Cherokee's' tire size.

Trim Options:

### LaredoLimitedOverland

## P245/65R17 105

### Simplified Size: 245-65-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2008 Jeep Grand Cherokee is **P245/65R17 105S**. A color-coded explanation of the 2008 Jeep Grand Cherokee's tire size is shown below.

P | This letter denotes the intended use of the tire.
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245 | This number indicates that your tire has a width of 245 millimeters. | ||||||

17 | The tire size was designed to fit rims or wheels that are 17 inches in diameter. | ||||||

105 | This tire has a load index of 105, which means it's capable of carrying a load of 2035 pounds (925 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

65 | This number means that your tire has an aspect ratio of 65%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% of the width. In this case, the sidewall height works out to be 159 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
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This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 18-Inch Rims

### 2008 Jeep Grand Cherokee

The original tire size for your 2008 Jeep Grand Cherokee is listed below. Tap on the box to view a color-coded explanation of your Jeep Grand Cherokee's' tire size.

Trim Options:

### LimitedOverland

## 245/60R18 105

### Simplified Size: 245-60-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2008 Jeep Grand Cherokee is **245/60R18 105S**. A color-coded explanation of the 2008 Jeep Grand Cherokee's tire size is shown below.

245 | This number indicates that your tire has a width of 245 millimeters. | ||||||

18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. | ||||||

105 | This tire has a load index of 105, which means it's capable of carrying a load of 2035 pounds (925 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

60 | This number means that your tire has an aspect ratio of 60%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 60% of the width. In this case, the sidewall height works out to be 147 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 20-Inch Rims

### 2008 Jeep Grand Cherokee

The original tire size for your 2008 Jeep Grand Cherokee is listed below. Tap on the box to view a color-coded explanation of your Jeep Grand Cherokee's' tire size.

Trim Options:

### SRT8

## 285/40R20 104(Rear)

### Simplified Size: 255-45-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2008 Jeep Grand Cherokee is **255/45R20 101W (Front)**. A color-coded explanation of the 2008 Jeep Grand Cherokee's tire size is shown below.

285 | This number indicates that your tire has a width of 285 millimeters. | ||||||

20 | The tire size was designed to fit rims or wheels that are 20 inches in diameter. | ||||||

104 | This tire has a load index of 104, which means it's capable of carrying a load of 1980 pounds (900 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

40 | This number means that your tire has an aspect ratio of 40%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width. In this case, the sidewall height works out to be 114 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### SRT8

## 255/45R20 101(Front)

### Simplified Size: 285-40-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2008 Jeep Grand Cherokee is **255/45R20 101W (Front)**. A color-coded explanation of the 2008 Jeep Grand Cherokee's tire size is shown below.

255 | This number indicates that your tire has a width of 255 millimeters. | ||||||

20 | The tire size was designed to fit rims or wheels that are 20 inches in diameter. | ||||||

101 | This tire has a load index of 101, which means it's capable of carrying a load of 1815 pounds (825 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

45 | This number means that your tire has an aspect ratio of 45%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width. In this case, the sidewall height works out to be 114 millimeters. | ||||||

R |
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This tire has a speed rating of W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |